Bucket tripper for steam shovels, dredges, or the like



1931- Q LA MONTV. TRIMMER ETAL 1,837,081

BUCKET TRIPPER FOR STEAM SHOVELS, DREDGES, on THE LIKE Filed Oct. 11, 1929 I INVENTORS Z WlTlgiSES Ia Ego/12a Vfifinpger W BY W 7 ATTORNEYS Patented Dec, 15,' 1931 LA MONT v. rmmn, or MIDDLE VALLEY, m FLOYD s.

KBIAL, or srame rown,

NEW JERSEY; KR'IAL ASSIGNOR TO SAID TRIMMER Application filed October 11,

This invention relates to bucket trippers V for steam shovels, dredges, or the like.

It is among the objects of the present invention to provide a novel and improved power means for opening the door of a bucket or dipper. a

A further object of the present invention is to provide a fluid-operated device for actuating the tiller rope of a bucket or dipper trip lever. t v a A further object of the present invention is to provide adevice of the character described, which is simple in construction and operation and well designed to meet the demands of economic manufacture. 7

Other objects of the present invention will be apparent from a consideration of the fol lowing specification taken in conjunction with the accompanying drawings, in which Figure 1 is a sideelevation of one form of the present invention mounted upon the boom of a conventional steam shovel; r

Fig. 2 is a detail view of the present invention shown in section. 7

Referring more particularly to the draw ings, it will be seen that the device is illustrated as applied to the boom 10 of a conventional steam shovel, but it will be understood that the invention is not limited to the point 01 application herein shown nor to the shovel herein depicted. It will'readily be seen that F the device may be applied in any desired position and in connection with any desired type of shovel.

The shovel herein illustrated includes in conjunction with the boom 10, the conventional dipper arm 11, bucket 12, and trip lever toggle 13, the rocking of which acts to release the door 14 of the bucket, The structure here illustrated also includes the conventional drums and cables used to operate the bucket or dipper, dipper arm and boom, the boom 10. being provided with a fluid motor 15, which controlled by the operator for'actuating the bucket arm 11, it being understood that fluid under pressure, such as steam or air from the engine, may be directed to the motor 15 for operating the same at the will of the operator. 7

In conventional practice, the trip lever 13 is 1929. Serial in. 399,011;

actuated (by movement of the tiller rope 16 which passes over a pulley 17 carried by the pivoted arm 18. V The rope 16 is looped about the pulley and is associated withthe rear end of the dipper arm 11, as at 19; 'In' conventional practice, the arm 18 may be manually moved by the operator :through a suitable attaching cable or trip rope. t

In the use of the conventional arrangement as described, the tiller rope is usually '60 overthe operators head and the operator. is usually required to stand up in order to apply sufficient energy to actuate the trip rope to .open the bucket or dipper door. In so standing,the'operatorioften loseshis control ofthe dipper-controllingfoot lever, and thus the dipper may drop and cause considerable damage whileathe operator is attempting to release the bucket door. 1 In the present invention, in place 'of the' trip rope leading to the operator" there is provided'a tiller ropefoperating ca 1e20, one end of which is associated with the arm 18 while the opposite 'end is carried upon a sliding frame 21 mounted inguide members 22 of the external wall of a fluid cylinder 23. The cylinder is then mounted upon'the boom '10- and is provided with a piston24 and piston rod 25 which exl ends from the cylinder to engage the lower end of the frame 21, as at 26.

or operating the piston, fluid is supplied to the cylinder through a pipe 27 ,which is connectedby 'a valve 28 with the motor 15. The valve 28 "is controlled by an operating cord29, which leads-tothe operator ofthe shovel, the arrangement being such that when the valve is opened, fluid isadmitted to the cylinderand the piston 24 is forced downwardly thus moving down the frame 21 and pulling the rope 20. With the present invention it willbe seen that the strength usually required to operate the tiller rope is supplied by the fluid pressure through the pipe 27 under the control of the valve 29,

7 whereby the operator may easily control the 51 valve 29 to supply to the cylinder the desired amount of pressure, whereby the move ment of the cylinder will movethe tiller rope 20.

It will be understood that the invention is not confined to the pivoted arm 18, and that if desired the trip rope may extend directly to the trip lever 13. It will thus be seen that the present invention is not confined to the specific structural details herein presented butrthat numerous changes, modifications and'the full use of equivalents may be resorted to without departing from the spirit or scope of the present invention as outlined in the present claims.

What is claimed is:

1. In combination with a steam shovel or the like, including a dipper, dipper arm and a boom, means for actuating the door of the dipper, said means including a pulley mounted at anintermediate point on said boom, 1: fluid pressure cylinder mounted on said boom and rearwardly ofsaid. pulley, a pistonin said cylinder and operable outwardly of the rearwardly directed end thereof, a frame enclosing said. cylinder and. connected at its rearwardlly directed end tosaid piston for movement therewith, an actuating cable attached to said pulley at one end and to the forwardly directed end of said frame at its other end, and means for controlling the fluid pressure supplied to said cylinder.

2. In: combination with a steam shovel or the like, including a dipper, dipper arm and a boom, means for actuating the door of thedippe'r, said means including an arm dependingly pivoted at an intermediate point on and at one side of said boom and rearwardly of said dipper arm, a pulley mounted on the lower end of said depending arm, a fluid pressure cylinder mounted-on the same of said boom andrea-rwardly of said arm, a piston in said cylinder and operable outwardly of the rearwardly directed end thereof, a frame enclosing said cylinder and connected at its rearwardly directed'end to saidpiston for movement therewith, an actuzting cable attached at one end to the dipper door operating means and to the forwardly directed end of said frame at its other end,

and means for controlling the fluid pressure s'uppliedrto said cylinder.

LA MONT V. TRIMMER. FLOYD R. KRIAL. 

